1865668 has 24 divisors (see below), whose sum is σ = 3894912. Its totient is φ = 764544.

The previous prime is 1865659. The next prime is 1865671. The reversal of 1865668 is 8665681.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1865668.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 805 + ... + 2092.

It is an arithmetic number, because the mean of its divisors is an integer number (162288).

2^1865668 is an apocalyptic number.

It is an amenable number.

1865668 is an abundant number, since it is smaller than the sum of its proper divisors (2029244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1865668 is a wasteful number, since it uses less digits than its factorization.

1865668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931 (or 2929 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 1865668 is about 1365.8945786553. The cubic root of 1865668 is about 123.1056883486.

The spelling of 1865668 in words is "one million, eight hundred sixty-five thousand, six hundred sixty-eight".